Angiosperm flowers may be monoecious, cleistogamous or show self incompatibility. Describe the characteristic features of each one of them and state. Which one of these flowers promotes inbreeding and outbreeding respectively.
Angiosperm flowers may be monoecious, cleistogamous or show self incompatibility. Describe the characteristic features of each one of them and state. Which one of these flowers promotes inbreeding and outbreeding respectively.
Angiosperm flowers may be monoecious, cleistogamous or show self incompatibility. Describe the characteristic features of each one of them and state. Which one of these flowers promotes inbreeding and outbreeding respectively.
The characteristic features of angiospermic flowers: (i) Monoecious flower are unisexual,i.e.they have either the male reproductive or female reproductive part in separate flowers, both produced on same plant. The flowers (male and female) are separate. It prevents self-pollination and promotes cross-pollination. (ii) Cleistogamous flowers are those flowers in which anthers and stigmas lie close to each other and do not open at all, even at maturity. These flowers are invariably autogamous and promotes inbreeding depression as there is no chance for cross-pollination at all. (iii) Self incompatible in angiospermic flowers is a genetic mechanism wherein the flowers prevent the self pollens from fertilising the ovules or inhibits their germination on stigma. This device or mechanism promotes out breeding.
Angiosperm flowers may be monoecious, cleistogamous or show self incompatibility. Describe the characteristic features of each one of them and state. Which one of these flowers promotes inbreeding and outbreeding respectively.
Answers
Vinu.v
The characteristic features of angiospermic flowers:
(i) Monoecious flower are unisexual,i.e.they have either the male reproductive or female reproductive part in separate flowers, both produced on same plant. The flowers (male and female) are separate. It prevents self-pollination and promotes cross-pollination.
(ii) Cleistogamous flowers are those flowers in which anthers and stigmas lie close to each other and do not open at all, even at maturity. These flowers are invariably autogamous and promotes inbreeding depression as there is no chance for cross-pollination at all.
(iii) Self incompatible in angiospermic flowers is a genetic mechanism wherein the flowers prevent the self pollens from fertilising the ovules or inhibits their germination on stigma. This device or mechanism promotes out breeding.